Pseudotachylite

Metapelite

Pseudotachylite and Metapelite

Pseudotachylite

Metapelite

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1 Definition

1.1 Definition

Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.

Metapelite is an old and currently not widely used field geological term for a clay rich fine-grained clastic sediment or sedimentary rock, i.e. mud or a mudstone

1.2 History

1.2.1 Origin

USA

Unknown

1.2.2 Discoverer

Unknown

1.3 Etymology

From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.

From Pelos or clay in Greek

1.4 Class

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Quench

Foliated

2.2 Color

Black, Brown, Colourless, Green, Grey, Pink, White

Dark Greenish - Grey, Green, Light Green, Light Greenish Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

81% Metamorphic Rocks Rocks have it !

✔ ✘

81% Metamorphic Rocks Rocks have it !

2.4.2 Scratch Resistant

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

65% Metamorphic Rocks Rocks have it !

2.4.3 Stain Resistant

✔ ✘

42% Metamorphic Rocks Rocks have it !

✔ ✘

42% Metamorphic Rocks Rocks have it !

2.4.4 Wind Resistant

✔ ✘

19% Metamorphic Rocks Rocks have it !

✔ ✘

19% Metamorphic Rocks Rocks have it !

2.4.5 Acid Resistant

✔ ✘

15% Metamorphic Rocks Rocks have it !

✔ ✘

15% Metamorphic Rocks Rocks have it !

2.5 Appearance

Dull and Soft

Banded

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

As Building Stone, As Facing Stone

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement

Cement Manufacture, Construction Aggregate, for Road Aggregate

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Gemstone

Commemorative Tablets, Creating Artwork

4 Types

4.1 Types

Not Available

4.2 Features

Host Rock for Lead

Easily splits into thin plates, It is One of the Oldest, Strongest and Hardest Rock

4.3 Archaeological Significance

4.3.1 Monuments

Used

Not Yet Used

4.3.2 Famous Monuments

Data Not Available

Not Applicable

4.3.3 Sculpture

Not Yet Used

4.3.4 Famous Sculptures

Not Applicable

4.3.5 Pictographs

Not Used

Used

4.3.6 Petroglyphs

Not Used

Used

4.3.7 Figurines

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Pseudotachylite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Metapelite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

5.2 Composition

5.2.1 Mineral Content

Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Albite, Chlorite, Quartz

5.2.2 Compound Content

Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur

Aluminium Oxide, CaO, MgO

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

50% Metamorphic Rocks Rocks have it !

✔ ✘

50% Metamorphic Rocks Rocks have it !

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Not Applicable

5.3.3 Weathering

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

65% Metamorphic Rocks Rocks have it !

5.3.4 Types of Weathering

Not Applicable

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

77% Metamorphic Rocks Rocks have it !

✔ ✘

77% Metamorphic Rocks Rocks have it !

5.3.6 Types of Erosion

Not Applicable

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

5-6

6.1.2 Grain Size

Very fine-grained

Medium to Fine Coarse Grained

6.1.3 Fracture

Uneven

Fibrous

6.1.4 Streak

Light to dark brown

Unknown

6.1.5 Porosity

Less Porous

Highly Porous

6.1.6 Luster

Vitreous

Earthy

6.1.7 Compressive Strength

What Is Flint

⊕

▶

▼

60.00 N/mm²

Rank: 25 (Overall)▶

Not Available

Rank: N/A (Overall)▶

▲

What Is Obsidian

⊕

▶

175 (What Is Grani..)

◀ ▶ ADD ⊕

6.1.8 Cleavage

Irregular

Not Available

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

2.46-2.86

3.4-3.7

6.1.11 Transparency

Transparent to Translucent

Opaque

6.1.12 Density

2.7-2.9 g/cm³

0-300 g/cm³

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

What Is Banded ..

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▶

▼

0.92 kJ/Kg K

Rank: 10 (Overall)▶

0.72 kJ/Kg K

Rank: 20 (Overall)▶

▲

What Is Granulite

⊕

▶

1.09 (What Is Trave..)

◀ ▶ ADD ⊕

6.2.2 Resistance

Heat Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

South Korea

Not Yet Found

7.1.2 Africa

Western Africa

7.1.3 Europe

Great Britain, Switzerland

United Kingdom

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Not Yet Found

Not Available

7.2.2 South America

Not Yet Found

Brazil, Colombia, Ecuador

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

All about Pseudotachylite and Metapelite Properties

Know all about Pseudotachylite and Metapelite properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite and Metapelite belong to Metamorphic Rocks.Texture of Pseudotachylite is Quench whereas that of Metapelite is Foliated. Pseudotachylite appears Dull and Soft and Metapelite appears Banded. The luster of Pseudotachylite is vitreous while that of Metapelite is earthy. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Metapelite is available in dark greenish - grey, green, light green, light greenish grey colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Metapelite are commemorative tablets, creating artwork.